The 23rd chromosome pair decides if you'll be male or female.

Your mom always gives an X chromosome. Your dad either gifts an X or Y. So, Dad’s the wildcard!

💡 Real-World Example: Think of Mom as always giving you socks for Christmas (useful but predictable), and Dad is the guy who might give you socks OR a skateboard!

• Bigger and quite important! Centromere near the middle.
• 900 genes that are essential for everyone.

• Smaller, with centromere near one end.

• 55 genes, many unique to males.

  💡 Real-World Example: Think of the X chromosome as the Swiss Army knife (super versatile), while the Y chromosome is like a specialized tool—good for a specific job, like being a male!

Klinefelter's Syndrome: XXY --> Develops as a male

Turner’s Syndrome: X0 --> Develops as a female

💡 Real-World Example: Imagine having a cake recipe. For a basic cake (female), you need the base ingredients. If you add extra frosting (Y chromosome), it becomes a boy cake!